So far I love the resin. Absolutely great. It does take longer to set up in the UV vs straight sun though.
My entire enclosure, (the part the mid bass driver is in), is MDF. There's only one corner that's not.
That corner will get a few layers of 1.5 oz chop mat and a couple 3/16 steel stiffening rods inside. There's one long part that the 6.5 side has in it, that will also get reinforced, but not as much. Since that side was left intentionally open into behind the door panel.
The staples shouldn't matter since it'll all be resined over and sanded down. Worked fine on the old pods I built anyway.
The other box I stretched different and has a lot less stapling on the face lol.